We ended up getting an email prior to the reshoot, I think it was sent out to the entire cast.
In a new interview with VanityFair, Fisher described Whedon’s attitude as being responsible for “gaslighting” the film’s cast and crew.
“What ended up happening, I think, was a bit of a collaborative gaslighting that we got from Joss.
While the initial email seemed promising enough, Ray Fisher goes on to state that it was apparent early on that Joss Whedon was still upset over the poor reception to his previous superhero movie, Age of Ultron, which ended up informing his decisions on the sets of Justice League.